program is called ddu, not sure that it will fix your issue, but worth a shot. run it in safe mode, i usually select the shutdown for install option. then install the gpu once the pc turns off, boot up(if it lets you) and install the latest drivers.
no need to put the old card in for this, just run it with your igpu.
https://www.guru3d.com/download/display-driver-uninstaller-download/